Electrically-driven rolling-mill.



No. 699,950. Patented May I3, |902.

M'. HARVEY. ELEGTRICALLY DRIVEN ROLLINGMILL.

(Application led Jan. 10, 1901.)

No. 699,950. A Patented May I3, i902.

, M. HARVEY.

ELEGTBICALLY DBIVEN ROLLING MILL.

(Application ined Jah. 1o, 1901.)

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Patented Ma'y {3,1902}l M. HARVEY. 'ELECTRICALLY DRIVEN RULLl-NG I ILL.

(Application filed J'n. 10, 1901.)

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UNITED STATES PATENT OFFICE.

MINOR'HARVEY, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO MORSE, VILLIAMS AND COMPANY, A CORPORATION OF PENNSYLVANIA.

ELECTRlCALLY-DRIVN ROLLING-MILL.

SPECIFICATION forming part of Letters' Patent No. 699,950, dated May 13, 1 902.

Application filed January 10,l 1901. Serial No. 42,707. (No model.)

To tl/ "tu/"tom, it may concern:

Be it known that I, MINOR HARVEY, ofthe d city and county ofPhiladelphia and State of Pennsylvania, have invented an Improvement'in Electrically-Drivenl Rolling-Mills, of which the following is a specification.

My invention has reference to electricallydrive'n rolling-mills and it consistsof certain improvements, all of which are fully set forth in the vfollowing specification and shown in the accompanying drawings, which forma part thereof.V

The object of my invention is to provide driving means for rolling-mills whichshall cause the rolls to operate smoothly, accu-I rately,and with great power, while at the same time taking up a minimum of door-space.

My invention comprehends certain improvements whereby the power-shaft for operating the rolls shall be carried in bearings on the top of the housings and connected with one or both rolls by power-transmitting connections, preferably in the form of shafts and gearing.

In carrying out my invention I provide the respective rolls with elongated shafts extending through the bearings in the housings in opposite directions, and these I connect by Worm and worm-wheel gearing With'two vertical shafts having their upperfends geared together with a transverse driving shaft which may be driven by an electric motor or otherwise. This transverse shaft is supported in bearings above the housings ofthe rolls and arranged, preferably, in a diagonal direction relatively to the axis of the rolls, so that the wormsand their vertical shafts may be arranged, respectively, upon opposite sides of their worm-wheels to cause the rolls to rotate in opposite directions.

My invention also embodies many details of construct-ion, all of which will be better understood by. reference to the drawings, in which- Figure lis an elevation of a rolling-mill,with part in section, embodying my improvements. Fig. 2 is a side elevation of same. Fig. 3 is a planviewof same with part of the gearing removed, and Fig. 4. is a plan view showing a modified form of the gearingladapted to my invention.

AA A are the housings of the rolling-mill. B B' are the two rolls, and b b are the eX- tended shafts of the respective rolls. These rolls are journaled in suitable adjustable bear- 5 5 ings, (not shown,) as is customaryin rollingmills of this character'. Y

The type of rolling-mill shown in this application is that adopted by theUnited States Government for mint purposes; but the only 6o portions thereof which are of special interest to this application are the means of applying power for operating the rolls and towhich the 'claims are specially directed. The ends of the shafts b b' are provided with worm-wheels O, 65 as shown in Fig. 8. Meshing with these wormwheels O are the worms D,secured upon vertical shafts d; but I prefer to arrange the said worms and their shafts upon opposite sides of the respective worm-Wheels, so as to cause 7o them and their rolls to rotate in opposite directions.

E represents casngs inclosing the gears C D and to provide a receptacle to contain oil to secure perfect lubrication of the gears.`

The casings have horizontal bearings c for the horizontal shafts b b of the rolls and vertical bearings R F to receive and guide the vertical worm-shafts d. The upper bearing R is secured to the top of the casing E and also 8o carries a stuffing-box e, through which the shaft d extends. The lower bearing F is formed on a cap-plate or head E', bolted to the lower part of the casing and provided with ball-bearin gs :f, upon which the shaft d is 8 5 stepped. These ball-bearings f may be adjusted vertically by an adj usting-screw G, if so desired. Interposed between the upper 'bearing R and the worm D is a ball thrustbearing t', the=upper plate of which is ad- 9o j usted by the wedge J, having an upper-inclined edge working against a iiXed cam I on the upper bearing. This wedge .I is adjustable laterally by the screws KK.` By means of this adjusting-wedge J and they adjustingscrew Gr the vertical shaft d maybe held against loose playandtheproper v'position ot the Worm .D relatively tothe worm-wheel C definitely secured. This is important in a constructionsuch as shown,wherein the roots roo of the spirals of the Worm are on a curve corresponding with the maximum curvature of the worm-wheel C, because to secure the best results the worm should be adjusted vertically to suit any vertical adjustment of the rolls B B in setting up the machine when adjusting the worm to the worm-wheel or when adjusting the worm to compensate for wear in the bearings.

The casings E are made in segments, so as to be removed to expose the gears or readily applied in setting up the rolls. The gearing-bearings and easing structures on each side of the housings is the same, one set being applied to the shaft b of the upper roll B and the other set to the shaft b' of the lower roll B. It thus follows that they are located at diderent elevations, corresponding to the distance between the axis of the rolls. It will also be seen that the two shafts d are also of differ-en t lengths for the same reason.

The upper ends of the long shafts d are received in sockets in the short shafts T, journaled in the bearings L, which latterare connected in any suitable manner in fixed relation to the top of the housings A. As shown, these bearin gs L are secured to the baseframe H of the electric motor H, which in turn is secured to the top of the housings A by standards h. The shaft N of the electric motor H is horizontal and geared to the short shafts T b y bevel or miter gears M, inclosed, if desired, in cases ym. The connection between the shafts d and T is such that while perlnitting of vertical adjustment they positively rotate together. The most convenient way of securing this is to employ a heavy key or to make the upper end of the shafts d square and fitted to a square socket in shafts T, said structure being well-known mechanical equivalents.

By examining Fig. 3 it will be observed that the shafts d d are in diagonal alinement relatively to the axis of the rolls, and for this reason the motor H is set diagonally, so as to make its shaft N correspond to the diagonal alinement of the shafts d, thereby securing the most simple and direct power-transmission and even distribution of the live load above the rolling-mill proper. This enables a small base to be used on the mill, small vibration produced, and a minimum strength of anchoring devices necessary. This diagonal arrangement is more especially applicable to use with slow-speed motors; but in cases where high-speeds motors are used the mitergears M may be replaced by worm and wormwheel gearing, as at M in Fig. 4, in which case the motor-shaft N may be arranged parallel to the axis of the rolls and have its weight centrally distributed above the housings.

Vhile I prefer to rotate both rolls independently from the power-shaft by separate sets of shafts and gearing, it is evident that I may employ only a single set of power-transmitting connections to one of the rolls and allow the t-wo rolls to be directly geared together in the common and well known manner.

I have shown an electric motoras the immediate source of power for operating the powershaft N in its bearings n on the base H'; but I do not limit myinvention to any particular power, as the shaft N may be driven in any manner desired.

While I prefer the construction illustrated as being well adapted to the purpose of my invention, I do not limit myself to the details thereof, as they may be modified in various ways without departing from the spirit ofthe invention.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is-

I. The combination of the two rolls of a rolling-mill, with two vertical shafts and connecting worm and worm -wheel gearing arranged upon opposite ends of the two rolls for independently and mechanically rotating the respective rolls, a transverse power-shaft carried in suitable bearings on the top of the housings of the rolling-mill, and independent connecting-gearing between the ends of the power-shaft and the upper ends of the two Vertical shafts.

2. The combination of the two rolls of a rolling-mill, with two vertical shafts and connecting worm and worm-wheel gearing arranged upon opposite ends of the two rolls for independently and mechanically rotating the respective rolls, a horizontal transverse and diagonally-arranged power-shaft carried in suitable bearings on the top of the housings of the rolling-mill, and independent connecting-gearing between the ends ofl the powershaft and the upper ends of the two vertical shafts.

3. In a rolling-mill, the combination of the housings and horizontal rolls journaled therein one of which has its end projecting beyond the end of the other roll, a motor for operating the rolls secured on top of the housings and above the rolls and provided with a transverse power-shaft, a worm-wheel secured to the projecting end of the roll and extending beyond the line of the shorter end of the other roll, an upright shaft extending from the level of the rolls to the power-shaft, gearing between the powershaft and upright shaft, and a worm on the upright shaft gearing with the worm-wheel of the rolls.

4. In a rolling-mill, the combination of the housings and horizontal rolls journaled therein one of which has its end projecting beyond the end of the other roll, a motor for operating the rolls secured on top of the housings and above the rolls and provided with a transverse power-shaft, a worm-wheel secured to the projecting end of the roll and extendingbeyond the line of the shorter end of the other roll, an upright shaft extending from the level of the rolls to the power-shaft,gearing between the power-shaft and upright shaft, a worm on the upright shaft gearing with the worm-wheel of the rolls, and a casing inclosing the worm and worm-wheel gearing secured to the hous- IOO IIC

ing andprovided with a bearing for the upright shaft.

5. In a rolling-mill, the combination of the housings and the two rolls,with a motor forrotating the rolls arranged immediately above and supported by the housing, and two sets of power-transmitting connections between the motor and the opposite ends of the respective rolls .for rotating them in opposite directions.

G. In a rolling-mill, the combination of the housings,the two rolls having their operatingshafts extended through the housings in opposite directions, Worm-Wheels secured upon said extended rollshafts,worms meshing with opposite sides of said respective Worm-wheels upright shafts for operating the worms, and a diagonally-arranged power-shaft carried in bearings upon the upper part of the housings and having its ends mechanically connected with the upper ends of the upright shafts.

7. In a rolling-mill, the combination of the housings the two rolls having their operatingshafts extended through the housings in opposite directions, worm-wheels secured upon saidextended roll-shafts,worn1s meshing with opposite sides of said respective Worm-Wheels upright shafts for operating the Worms, a diagonally arranged power shaft carried in bearings upon the upper part of the housings and having its ends mechanically connected with the upper ends of the upright shafts inclosing casings surrounding the Worms and worm-wheels secured to the housings at different elevations and provided with bearin gs for the upright shafts.

In testimony of which invention I have hereunto set my hand.

MINOR HARVEY.

IVitnesses:

R. M. HUNTER, J. W. KENWORTHY. 

